Pinker and Dennett were quite chummy at least 15 years ago (along with Richard Dawkins and Sam Harris) as part of the "New Atheist" movement in addition to thei

Pinker and Dennett were quite chummy at least 15 years ago (along with Richard Dawkins and Sam Harris) as part of the "New Atheist" movement in addition to their shared interest in cognitive matters. I don't know what they feel about each other today -- there's been quite a lot of infighting and "New Atheism" as a movement has sort of splintered.